Install Android 5.1.1 Lollipop on LG G3 D855 with CM12.1 Nightly ROM. The ROM is based on Android 5.1.1 Lollipop and all the features are working great, CM12.1 Nightly build are updated on daily based and every new update comes with minor improvements and bug fixes. In the below description we have mentioned the whole procedure to install the latest CM12.1 ‘Nightly’ ROM based on Android 5.1.1 Lollipop on LG G3 D855. You can also follow our previous post on the flashing CM12.1 updates on several devices, in this guide we are using the same method which we already used for other devices.

Overall the CM12.1 ROM is smooth and major features are working fine but as it’s a Nightly build so you may experience some bugs but don’t hesitate just go ahead and flash the Android 5.1.1 Lollipop firmware with CM12.1 Nightly ROM on your device. The CyanogenMod ROMs has a built in software update support via OTA system for future updates. Below we have mentioned the complete procedure along tools needed to flash the Custom ROM on your device.

Disclaimer: This tutorial includes multiple operations which includes, Installing Custom ROMs. Follow the guide on your own risk, we are not responsible if you brick or damage your device however the chances of bricking a device are rare but you have to pay full attention on the complete guide to avoid any issues and difficulties while performing any of the above mentioned operation.

Turn of your device and boot into CWM custom Recovery menu by the hardware keys combination or using any third party app (Mostly found in Play store).

Once your device enters into CWM recovery, create a Nandroid backup of your device or follow our guide to create a Nandroid backup (this will create a backup of your complete device including current firmware) if something goes wrong you can restore your previous firmware.

Now it’s the time to flash the CM12.1 ROM on your device. Choose “install zip from sdcard” >> choose zip from sdcard & navigate to the folder in which you have copied the custom ROM.zip file and select it.

Select “yes” to confirm install, wait for a few minutes till the file is completely installed in your device.

Once done with the above step, now apply the same process with the installation of Android 5.1.1 Lollipop Gapps.

Wait for the installation process to complete. The first boot up may take 5-7 minutes.